Peter said, "Why do you call them bilberries and not blueberries?" so I explained that, strictly speaking, the wild ones are called bilberries in Europe and blueberries are the US species but they are related. Wikipedia gives more details. We do have a few blueberry bushes in the vegetable garden but they have only just flowered. The fruits are twice the size of the wild bilberries and the flavour is more intense.
This morning I picked one litre of wild bilberries in the forest, washed and froze them. I think I'll probably wait a couple of days before I pick some more as these were only just ripe and quite small. The red sieve is used for shaking off the leaves that inevitably get caught up in the combs when we're picking them.